Really good premiere. They pulled a couple of nice bait & switches and set up the levels of how deep this can possibly get. My only complaint is that I think they might've blown one or two loads too many such as revealing there's a bigger agenda to what Ed Harris' character is doing, and the hinting at the real intentions of the company. I think they should've held back on that and just focused on the core plot for now, which is intriguing enough.
At this point I'm almost convinced one of the folks running Westworld is an AI him/herself, most obvious would be Jeffrey Wright because there have been mentions of multiple things happening before his time at the company, so he could be created to assist Hopkins' character with his work, without realizing he himself is his biggest project.
Like I said, they did a tremendous job of setting up all the possible levels this can go.